{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Linear relationships were obtained between log mean retention time ( MRT ) and log species body weight ( W ) ( kg ) , and log elimination half - life ( t1 / 2 ) ( h ) and logW ."}
{"Chemical": []}